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guajiro [1.7K]
3 years ago
14

If BD bisects angle ABC, measure of DBC = 79 degrees, and measure of angle ABC= 9x-4, find the value of x.

Mathematics
2 answers:
saul85 [17]3 years ago
6 0

Try this option:

answer is 18.

For more information see the attached picture.

77julia77 [94]3 years ago
6 0

Answer:  18

Step-by-step explanation:

Given :  BD bisects angle ABC, measure of DBC = 79 degrees  ---(1), and measure of angle ABC= 9x-4.   (3)

We know that if a line bisects an angle then it means that it is dividing the angle into two equal parts.

So from the given question, we have

\angle{DBC}=\angle{DBA}=\dfrac{\angle{ABC}}{2}         (2)

From (1) and (2), we have

\dfrac{\angle{ABC}}{2}=79^{\circ}

i.e. {\angle{ABC}=2\times79=158^{\circ}

From (3), we have

9x-4=158\\\\\Rightarrow\ 9x=162\\\\\Rightarrow\ x=\dfrac{162}{9}=18

Hence, the value of x = 18.

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